Read and write Sharepoint Lists from external HTML/Javascript programs

I am trying to access (Basically get the list items and update the list items from/to) sharepoint externally through my website. Is there a way where I can do it ? I got CORS error when trying it from REST API, on digging deeper I found couple of resources saying it is not possible.

If there is any, my Sharepoint list just has 2 columns. Also how to specify colums and URL of my shrepoint site?